Process of treating pontianak.



A. R. BLLISON.

PROCESS 0F TRBATING PONTIANK.`

APPLICATION FILED 00T.13, 1999. RBNEWED APR. 23. 1913.

1,104,744. Patented Ju1y21,1914.

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Application led October 13, 11.909, Serial No. 522,437.. Renewed April 23, 1913. Serial No. 763,181.

To all 'whom t may concern.'

Be it known that I, ALBERT R. ELLIsoN, a citizen of the United States, residing at Brookline, in the kcounty of Suffolk and State of Massachusetts, haveinvented oertain new and useful Improvements in Processes of Treating Pontianak; and I do hereby declare the following to be a full, clear, and exact vdescription ofthe invention, such as will enable others skilled in the art to which it appertains to make and use the same.

My invention relates to a process o treating pontianak, and has for its object to produce a high grade of india rubber therey from.

c port; 2 any latter counteracts 1n' a sense stituting my 'To these ends the invention consists in the novel steps, and combinations of steps, conin the claims. y

Referring to the accompanying drawings forming a part of this specification in which the ligure is a diagrammatic view of one vform of apparatus suitable for carr ing out my process :-1. indicates any suitable supy suitable revolving receptacle pivoted at 3, and 4 a pulley driven from any suitable source of power.

In carrying out my process I preferably take equal parts of acetone, acetone oil and naphtha, cipitant acetone naphtha. In this mixture, when acting on the pontianak, I have the naphtha acting as a solvent, and the acetone, or the acetone oil, or both, acting as a precipitant, and the the. action of the former. When the mixture is prepared I place the whole in any suitable vessel such by making either the acetone or as 2, and lace the pontianak therein after from say six to ten hours,

grade, which is then taken out and boiled H process, all .as will-be more fully hereinafter disclosed and particularly pointed out and keep the mixture a weak pre-4 oil, orboth,slightly in excess of the of naphtha,

, rubber sbstantiall thoroughly in water for from fifteen to thirty minutes to remove all traces of chemicals. After this boiling the rubber may be put through any of the processes, or sub- ]ected .to any of the treatments, including vulcanization, to which-high grade rubber is usually subjected. The mixture in the vessel 2 may now be recovered by distillation in any suitable formof still, thereby removing all impurities; after which it may be used over` and over again, and strengthened at intervals to make it a slight precipitant.

I have found by actual tests that I am enabled by the process above disclosed to recover as much as from fifteen per cent. to twenty per cent. of rubber from the pontianak, and I prefer to vuse about eight pounds of pontianak to nine gallons of the mixture, and I prefer to carry out the process at ordinary temperatures andpressures. Good results, however, may be obtained by omitting the acetone oil and using the acetone in the proportion of two parts to one of naphtha, or two parts of acetone oil may be used to one part of naphtha if the acetone is omitted. Of course, other solvents than naphtha may also be used, but I prefer the latter.

It is obvious that those skilled in the art may vary the steps and proportions without departing from m invention, and therefore I donot wish to e understood as being limited to the details disclosed, except as mwa required by the claims.

1. The process of obtaining india rubber from pontianak, which consists in subjecting the' pontianak to the action of a mixture acetone oil and acetone for a to isolate the rubber; said resent e said time suiicient mixed acetone oil and acetone being in a quantity suiiicient to precipitate t as described.

2. The process o from pontianak, which consists in subjecting the pontianak to the action of a mixture of substantially one part acetone oil, and slightly more than one art acetone and for a time sufficient to isolate the rubber, substantially as described.

a5v obtaining india rubber l part of naphtha, one 'I 3. The process of obtaining india rubber jecting the recovered rubber to the action from pontianak,- which consists in subjectof boiling Water,l substantially as described. 1( ing the pontianak to the action of a mixture In testimon whereof, I afiix my signature, of substantially equal parts of naphtha, and in presence o two witnesses. acetone oil, and sllghtly more than one part ALBERT R. ELLISON. of acetone and for a time suicient to isolate Witnesses: l the rubber, agitating the pontianak While T. A. WITHERsPooN, being acted upon by the mixture; andI sub- N. W. BLoss. 

